Quarterly report pursuant to Section 13 or 15(d)

Consolidated Statement of Changes in Stockholders' (Deficit) Equity

v3.20.1
Consolidated Statement of Changes in Stockholders' (Deficit) Equity - USD ($)
Total
Fiscal Year To Date
Preferred Stock [Member]
Common Stock [Member]
Treasury Stock [Member]
Additional Paid-in Capital [Member]
Accumulated Deficit [Member]
Beginning balance at May. 31, 2019 $ (8,914,060) $ (8,914,060) $ 95 $ 329,555 $ (159) $ 220,119,856 $ (229,363,407)
Beginning balance, shares at May. 31, 2019     95,346 329,554,763 159,011    
Issuance of stock for note payable redemptions and conversions 1,005,000 1,005,000   $ 3,015   1,001,985  
Issuance of stock for note payable redemptions and conversions ,shares       3,014,181      
Proceeds from registered direct offering 2,255,800 2,255,800   $ 5,640   2,250,160  
Proceeds from registered direct offering, shares       5,639,500      
Offering costs related to registered direct offering, value (260,208) (260,208)       (260,208)  
Proceeds from public warrant tender offers 11,900,260 11,900,260   $ 45,376   11,854,884  
Proceeds from public warrant tender offers (shares)       45,375,923      
Proceeds from Series C Convertible Preferred offering 1,754,000 1,754,000 $ 2     1,753,998  
Proceeds from Series C Convertible Preferred offering, shares     1,754        
Offering costs related to Series C Preferred offering (197,460) (197,460)       (197,460)  
Dividends on Series C Convertible Preferred shares (110,826) (110,826)         (110,826)
Legal fees in connection with equity offerings (15,877) (15,877)       (15,877)  
Offering costs related to public warrant tender offers (1,058,466) (1,058,466)       (1,058,466)  
Stock-based compensation 580,727 580,727       580,727  
Inducement interest expense - debt conversion 2,430,514 2,430,514       2,430,514  
Net loss (16,163,999) (16,163,999)         (16,163,999)
Ending balance at Aug. 31, 2019 (6,794,595) (6,794,595) $ 97 $ 383,586 $ (159) 238,460,113 (245,638,232)
Ending balance, shares at Aug. 31, 2019     97,100 383,584,367 159,011    
Beginning balance at May. 31, 2019 (8,914,060) (8,914,060) $ 95 $ 329,555 $ (159) 220,119,856 (229,363,407)
Beginning balance, shares at May. 31, 2019     95,346 329,554,763 159,011    
Ending balance at Nov. 30, 2019 (13,631,597) (13,631,597) $ 100 $ 399,316 $ (159) 246,618,030 (260,648,884)
Ending balance, shares at Nov. 30, 2019     99,888 399,315,351 159,011    
Beginning balance at May. 31, 2019 (8,914,060) (8,914,060) $ 95 $ 329,555 $ (159) 220,119,856 (229,363,407)
Beginning balance, shares at May. 31, 2019     95,346 329,554,763 159,011    
Net loss (66,792,196)            
Ending balance at Feb. 29, 2020 (4,383,111) (4,383,111) $ 108 $ 471,092 $ (286) 291,829,006 (296,683,031)
Ending balance, shares at Feb. 29, 2020     107,873 471,092,106 286,008    
Beginning balance at Aug. 31, 2019 (6,794,595) (6,794,595) $ 97 $ 383,586 $ (159) 238,460,113 (245,638,232)
Beginning balance, shares at Aug. 31, 2019     97,100 383,584,367 159,011    
Issuance of stock for note payable redemptions and conversions 739,959 1,744,959   $ 2,269   737,690  
Issuance of stock for note payable redemptions and conversions ,shares       2,270,151      
Proceeds from registered direct offering 4,409,500 6,665,300   $ 13,461   4,396,039  
Proceeds from registered direct offering, shares       13,460,833      
Offering costs related to registered direct offering, value (73,690) (333,898)       (73,690)  
Proceeds from public warrant tender offers   11,900,260          
Proceeds from Series C Convertible Preferred offering 2,788,000 4,542,000 $ 3     2,787,997  
Proceeds from Series C Convertible Preferred offering, shares     2,788        
Offering costs related to Series C Preferred offering (181,722) (379,182)       (181,722)  
Dividends on Series C Convertible Preferred shares (150,184) (261,010)         (150,184)
Legal fees in connection with equity offerings   (15,877)          
Offering costs related to public warrant tender offers   (1,058,466)          
Stock-based compensation 434,245 1,014,972       434,245  
Note conversion and extension fees, Value (216,800) (216,800)       (216,800)  
Exercise of option to repurchase common stock (8,342) (8,342)       (8,342)  
Inducement interest expense - debt conversion 282,500 2,713,014       282,500  
Net loss (14,860,468) (31,024,467)         (14,860,468)
Ending balance at Nov. 30, 2019 (13,631,597) (13,631,597) $ 100 $ 399,316 $ (159) 246,618,030 (260,648,884)
Ending balance, shares at Nov. 30, 2019     99,888 399,315,351 159,011    
Issuance of stock for note payable redemptions and conversions 9,077,229 10,822,188   $ 17,683   9,059,546  
Issuance of stock for note payable redemptions and conversions ,shares       17,682,895      
Proceeds from registered direct offering 6,000,499 12,665,799   $ 19,756   5,980,743  
Proceeds from registered direct offering, shares       19,755,761      
Offering costs related to registered direct offering, value (43,961) (377,859)       (43,961)  
Proceeds from public warrant tender offers   11,900,260          
Proceeds from private warrant exchange 5,985,092 5,985,092   $ 20,439   5,964,653  
Proceeds from private warrant exchange, shares       20,440,745      
Offering costs related to private warrant exchange (197,253) (197,253)       (197,253)  
Inducement interest expense - public warrant tender offers 5,163,110 5,163,110       5,163,110  
Proceeds from Series C Convertible Preferred offering 415,000 4,957,000       415,000  
Proceeds from Series C Convertible Preferred offering, shares     415        
Offering costs related to Series C Preferred offering (53,186) (432,368)       (53,186)  
Dividends on Series C Convertible Preferred shares (204,199) (465,209)         (204,199)
Legal fees in connection with equity offerings   (15,877)          
Offering costs related to public warrant tender offers   (1,058,466)          
Stock-based compensation 3,330,536 4,345,508       3,330,536  
Stock issued for bonuses and tendered for income tax, value 154,552 154,552   $ 380 $ (127) 154,299  
Stock issued for bonuses and tendered for income tax, shares       379,880 126,997    
Proceeds from warrant exercise 5,427,687 5,427,687   $ 10,716   5,416,971  
Proceeds from warrant exercise, shares       10,715,732      
Note conversion and extension fees, Value 0 (216,800)   $ 0   0  
Note conversion and extension fees, Shares       0      
Exercise of option to repurchase common stock   (8,342)          
Inducement interest expense - debt conversion   2,713,014          
Net loss (35,767,729) (66,792,196)         (35,767,729)
Proceeds from Series D Convertible Preferred offering 7,570,000 7,570,000 $ 8     7,569,992  
Proceeds from Series D Convertible Preferred offering, shares     7,570        
Stock issued for services       $ 2,620   (2,620)  
Stock issued for services, shares       2,620,000      
Dividends on Series D Convertible Preferred shares (62,219) (62,219)         (62,219)
Offering costs related to Series D Preferred offering (4,645) (4,645)       (4,645)  
Relative fair market value associated with warrants exercised 2,404,098 2,404,098       2,404,098  
Exercise of stock options 53,875 53,875   $ 182   53,693  
Exercise of stock options, shares       181,742      
Ending balance at Feb. 29, 2020 $ (4,383,111) $ (4,383,111) $ 108 $ 471,092 $ (286) $ 291,829,006 $ (296,683,031)
Ending balance, shares at Feb. 29, 2020     107,873 471,092,106 286,008